THE PAST century has seen a multipolar world through the end of World War II, a bipolar world through the end of the Cold War and a dissipating unipolar world since. Economic multipolarity is already a reality. And, in military terms, America’s unipolar dominance over the air and sea-lanes will not last forever, given the rise of naval powers across Asia. Moreover, the advantages that accrue to terrorists and insurgents, for whom war is a way of life and who kill indiscriminately, have put tremendous strain on the U.S. security establishment. America’s prospects for global primacy appear bleak.